I can photograph someone if I can touch them.

That's one of the troubles of photography the implication that what you have in that photograph is the way it is, and of course a year later that's not the way it is. Life moves on and the picture stays. That can be a wonderful idea to be a part of history and on the other hand, you think pictures have a life that they don't have.

There's never a time that I'm not intrusive. That's the base of what we - photographers - do: we're intrusive. Anyone saying the opposite is silly. There's a process and a means of getting to know people and getting them to trust you, but I'm always very aware that I'm visiting - that I'm there, that I have a responsibility, but I am intrusive.